<template>
  <div>
    <div class="shopcart">
    <div class="content" @click="toggleList">
      <div class="content-left">
        <div class="logo-wrapper">
          <div class="logo" :class="{'highlight' :totalCount>0}">
            <i class="icon-shopping_cart" :class="{'highlight' :totalCount>0}"></i>
          </div>
          <div class="num" v-show="totalCount>0">{{totalCount}}</div>
        </div>
        <div class="price" :class="{'highlight' :totalPrice>0}">¥ {{totalPrice}}</div>
        <div class="desc">另需配送费 ¥ {{deliveryPrice}}元</div>
      </div>
      <div class="content-right" @click.stop.prevent="pay">
        <div class="pay" :class="payClass">{{payDesc}}</div>
      </div>
    </div>
    <!-- <div class="ball-container">
      <transition name="drop">
        <div v-for="(ball,i) in balls" :key="i" v-show="ball.show" class="ball">
          <div class="inner"></div>
        </div>
      </transition>
    </div> -->
    <transition name="fold">
      <div class="shopcart-list" v-show="listShow">
        <div class="list-header">
          <h1 class="title">购物车</h1>
          <span class=empty @click="empty">清空</span>
        </div>
        <div class="list-content" ref="listConent">
          <ul>
            <li class="food" v-for="(food,i) in selectFoods" :key="i">
              <span class="name">{{food.name}}</span>
              <div class="prive">
                <span>¥{{food.price*food.count}}</span>
              </div>
              <div class="cartcontrol-wrapper">
                  <cartcontrol :food="food"></cartcontrol>
                </div>
            </li>
          </ul>
        </div>
      </div>
    </transition>
  </div>
  <transition name="fade">
    <div class="list-mask" @click="hideList" v-show="listShow">
    </div>
  </transition>
  </div>
</template>

<script>
import cartcontrol from '@/components/cartcontrol/cartcontrol'
import BScroll from 'better-scroll'

export default {
  data () {
    return {
      balls: [],
      fold: true
    }
  },
  props: {
    selectFoods: {
      type: Array,
      default () {
        return {
          balls: [{
            show: false
          },
          {
            show: false
          },
          {
            show: false
          },
          {
            show: false
          },
          {
            show: false
          }]
        }
      }
    },
    deliveryPrice: {
      type: Number,
      default: 0
    },
    minPrice: {
      type: Number,
      default: 0
    }
  },
  computed: {
    totalPrice () {
      let total = 0
      this.selectFoods.forEach(food => {
        total += food.price * food.count
      })
      return total
    },
    totalCount () {
      let count = 0
      this.selectFoods.forEach(food => {
        count += food.count
      })
      return count
    },
    payDesc () {
      if (this.totalPrice === 0) {
        return `¥${this.minPrice}起送`
      } else if (this.totalPrice < this.minPrice) {
        let diff = this.minPrice - this.totalPrice
        return `还差${diff}起送`
      } else {
        return '去结算'
      }
    },
    payClass () {
      if (this.totalPrice < this.minPrice) {
        return 'not-enough'
      } else {
        return 'enough'
      }
    },
    listShow () {
      if (!this.totalCount) {
        this.fold = true
        return false
      }
      let show = !this.fold
      return show
    }
  },
  components: {
    cartcontrol
  },
  methods: {
    toggleList () {
      if (!this.totalCount) {
        return
      }
      this.fold = !this.fold
      if (!this.scroll) {
        this.scroll = new BScroll(this.$refs.listConent, {
          click: true
        })
      } else {
        this.scroll.refresh()
      }
    },
    empty () {
      this.selectFoods.forEach(food => {
        food.count = 0
      })
    },
    hideList () {
      this.fold = true
    },
    pay () {
      if (this.totalPrice < this.minPrice) {
        return
      }
      window.alert(`支付${this.totalPrice}元`)
    }
  }
}
</script>

<style lang="stylus">
@import "../../common/stylus/mixin.styl"
  .shopcart
    position fixed
    left 0
    bottom 0
    z-index 50
    height 48px
    width 100%
    .content
      display flex
      background-color #141d27
      font-size 0
      color rgba(255,255,255,.4)
      .content-left
        flex 1
        .logo-wrapper
          display inline-block
          position relative
          top -10px
          margin 0 12px
          padding 6px
          width 56px
          height 56px
          box-sizing border-box
          vertical-align top
          border-radius 50%
          background-color #141d27
          .logo
            width 100%
            height 100%
            vertical-align top
            border-radius 50%
            background-color #2b343c
            text-align center
            &.highlight
              background-color rgb(0,160,220)
            .icon-shopping_cart
              line-height 44px
              font-size 24px
              color #80858a
              &.highlight
                color: #fff
          .num
            position absolute
            top 0
            right 0
            width 24px
            height 16px
            line-height 16px
            text-align center
            border-radius 16px
            font-size 9px
            font-weight 700
            color #fff
            background-color rgb(240,20,20)
            box-shadow 0 4px 8px 0 rgba(0,0,0,.4)
        .price, .desc
          display inline-block
          vertical-align top
          line-height 24px
          margin-top 12px
          box-sizing border-box
          padding-right 12px
          border-right 1px solid rgba(255,255,255,.1)
          font-size 16px
          font-weight 700
          &.highlight
            color #fff
        .desc
          border 0
          margin 12px 0 0 12px
          font-size 10px
          font-weight 200
      .content-right
        flex 0 0 105px
        width 105px
        .pay
          height 48px
          line-height 48px
          text-align center
          font-size 12px
          font-weight 700
          background-color #2b333b
          &.not-enough
            background-color #2b333b
          &.enough
            background-color #00b43c
            color #ccc
    .fold-enter-active, .fold-leave-active
        transition: all .5s
        // opacity: 1
        transform translate3d(0,0,0)
    .fold-enter, .fold-leave-to /* .fade-leave-active below version 2.1.8 */
        // opacity: 0
        transform translate3d(0,100%,0)
    .shopcart-list
        position absolute
        left 0
        bottom 38px
        margin-bottom 10px
        z-index -1
        width 100%
        // transform translate3d(0,-100%,0)
        .list-header
            height 40px
            line-height 40px
            padding 0 18px
            background-color #f3f5f7
            border-bottom 1px solid rgba(7,17,27,.1)
            .title
              float left
              font-size 14px
              color rgb(7,17,27)
            .empty
              float right
              font-size 12px
              color rgb(0,160,220)
        .list-content
          padding: 0 18px
          max-height 217px
          overflow hidden
          background-color #fff
          .food
            position relative
            padding 12px
            box-sizing border-box
            border-1px(rgba(7,17,27,.1))
            .name
              line-height 24px
              font-size 14px
              color rgb(7,17,27)
            .prive
              position absolute
              right 90px
              bottom 12px
              line-height 24px
              font-size 14px
              font-weight 700
              color rgb(240,20,20)
            .cartcontrol-wrapper
              position absolute
              right 0
              bottom 6px
  .fade-enter-active, .fade-leave-active
      transition: all .5s
      opacity: 1
      background-color rgba(7,17,27,.6)
  .fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */
      opacity: 0
      background-color rgba(7,17,27,0)
  .list-mask
    position fixed
    top 0
    left 0
    width 100%
    height 100%
    z-index 40
    background-color rgba(7,17,27,.6)
    backdrop-filter blur(10px)
</style>
